static void warn_wall(usec_t n, struct shutdownd_command *c) {
assert(c);
assert(c->warn_wall);
if (n >= c->elapse)
return;
if (c->wall_message[0])
utmp_wall(c->wall_message, NULL);
else {
char date[FORMAT_TIMESTAMP_MAX];
const char* prefix;
char *l = NULL;
if (c->mode == 'H')
prefix = "The system is going down for system halt at ";
else if (c->mode == 'P')
prefix = "The system is going down for power-off at ";
else if (c->mode == 'r')
prefix = "The system is going down for reboot at ";
else
assert_not_reached("Unknown mode!");
if (asprintf(&l, "%s%s!", prefix, format_timestamp(date, sizeof(date), c->elapse)) < 0)
log_error("Failed to allocate wall message");
else {
utmp_wall(l, NULL);
free(l);
}
}
}
static int warn_wall(Manager *m, usec_t n) {
char date[FORMAT_TIMESTAMP_MAX] = {};
_cleanup_free_ char *l = NULL;
usec_t left;
int r;
assert(m);
if (!m->enable_wall_messages)
return 0;
left = m->scheduled_shutdown_timeout > n;
r = asprintf(&l, "%s%sThe system is going down for %s %s%s!",
strempty(m->wall_message),
isempty(m->wall_message) ? "" : "\n",
m->scheduled_shutdown_type,
left ? "at " : "NOW",
left ? format_timestamp(date, sizeof(date), m->scheduled_shutdown_timeout) : "");
if (r < 0) {
log_oom();
return 0;
}
utmp_wall(l, uid_to_name(m->scheduled_shutdown_uid),
m->scheduled_shutdown_tty, logind_wall_tty_filter, m);
return 1;
}
void server_forward_wall(
Server *s,
int priority,
const char *identifier,
const char *message,
const struct ucred *ucred) {
_cleanup_free_ char *ident_buf = NULL, *l_buf = NULL;
const char *l;
int r;
assert(s);
assert(message);
if (LOG_PRI(priority) > s->max_level_wall)
return;
if (ucred) {
if (!identifier) {
get_process_comm(ucred->pid, &ident_buf);
identifier = ident_buf;
}
if (asprintf(&l_buf, "%s["PID_FMT"]: %s", strempty(identifier), ucred->pid, message) < 0) {
log_oom();
return;
}
l = l_buf;
} else if (identifier) {
l = l_buf = strjoin(identifier, ": ", message, NULL);
if (!l_buf) {
log_oom();
return;
}
} else
l = message;
r = utmp_wall(l, "systemd-journald", NULL, NULL, NULL);
if (r < 0)
log_debug_errno(r, "Failed to send wall message: %m");
}
